/* 头部区域 */
.header {
    height: 100px;
    background-color: #fff;
}

.header .wrapper {
    padding-top: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 80px;
}

/* logo */
.logo a {
    display: block;
    width: 195px;
    height: 41px;
    background-image: url(../images/logo.png);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: left center;
    font-size: 0;
    margin-left: 100px;
    border: none;
}

/* 导航 */
.nav {
    /* margin-left: 100px; */
    display: flex;
    margin-left: 100px;
}

.nav ul {
    list-style: none;

    display: flex;
    height: 40px;
    padding: 0;
    margin: 0;

}

.nav ul li {
    width: 65px;
}

.nav ul li a {
    text-decoration: none;
    font-size: 16px;
    color: rgb(107, 108, 109);
    padding-bottom: 5px;
}

.nav ul li .active,
.nav ul li a:hover {
    border-bottom: 3px solid rgb(7, 166, 255);
}


.search {
    display: flex;
    margin-left: 64px;
    padding-left: 19px;
    padding-right: 12px;
    width: 412px;
    height: 40px;
    background-color: #f3f5f7;
    border-radius: 20px;
}

.search input {
    flex: 1;
    border: 0;
    background-color: transparent;
    /* 去掉输入框焦点状态后的边框线 */
    outline: none;
}

/* ::placeholder 选中 input 标签时，placeholder 的样式 */
.search input::placeholder {
    color: #999;
    font-size: 14px;
}

.search a {
    /* 父级search是flex布局，子级为弹性盒子，所以a标签是flex布局 */
    /* align-self: center; 子元素垂直居中 */
    align-self: center;
    width: 16px;
    height: 16px;
    background-image: url(../images/search.png);
    /* background-size:cover; 图片自适应, contain 图片完整显示, 图片大小不变 */
    background-size: cover;
}

.user {
    margin-left: 32px;
    margin-top: 4px;
    width: 240px;
}

.user a {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    text-decoration: none;
}

.user img {
    margin-right: 7px;
    /* vertical-align: middle; 子元素垂直居中,行内块和行内元素的垂直对齐方式 */
    vertical-align: middle;
    width: 40px;
    height: 40px;
}

.user span {
    font-size: 16px;
    color: #666;
}

.banner {
    height: 420px;
    background-color: #0092cb;
}

.banner .wrapper {
    display: flex;
    justify-content: space-between;
    height: 420px;
    /* background-image: url(../images/banner.png);
    background-repeat: no-repeat;
    background-position: right center;
    background-size: cover; */
    overflow: hidden;
}

.banner .left {
    padding: 3px 20px;
    width: 191px;
    height: 99%;
    background-color: rgba(0, 0, 0, 0.42);
    margin: 0 0 0 100px;
}

.banner .left ul {
    margin: 0;
    padding: 0;
}

.banner .left ul li {
    list-style: none;
}


.banner .left a {
    /* 块级元素：宽度是父级的100%，高度是自身的高度 */
    display: flex;
    height: 46px;
    background: url(../images/right.png) no-repeat right center;
    line-height: 46px;
    text-decoration: none;
    font-size: 16px;
    color: #ccc;
    justify-content: space-between;
}

.banner .left a:hover,
.banner .left a.active1 {
    background-image: url(../images/right-hover.png);
    color: #00a4ff;
}

.banner .left ul li span:last-child {
    padding-right: 0px;
    margin-right: 10px;

}

.banner .center {
    height: 420px;
    width: 240px;
    margin: 0;
    flex: 1;

}

.banner .center img {
    margin: 0;
    height: 100%;

}

.banner .right {
    margin-top: 30px;
    width: 218px;
    height: 305px;
    background-color: #209dd5;
    border-radius: 10px;
}

.banner .right h3 {
    margin-left: 14px;
    height: 48px;
    line-height: 48px;
    font-size: 15px;
    color: #fff;
    font-weight: normal;
}

.banner .right .content {
    padding: 14px;
    height: 257px;
    background-color: #fff;
    border-radius: 10px;
}

.banner .right dl {
    margin-bottom: 12px;
    border-bottom: 1px solid #e0e0e0;
}

.banner .right dt {
    margin-bottom: 8px;
    font-size: 14px;
    line-height: 20px;
    font-weight: 700;
}

.banner .right dd {
    margin-bottom: 8px;
    font-size: 12px;
    line-height: 16px;
    margin-left: 0;
}

.banner .right dd span {
    color: #00a4ff;
}

.banner .right dd strong {
    color: #7d7d7d;
    font-weight: 400;
}

.banner .right a {
    display: block;
    height: 32px;
    background-color: #00a4ff;
    text-align: center;
    line-height: 32px;
    font-size: 14px;
    color: #fff;
    border-radius: 15px;
}

/* 精品推荐 */
.recommend {
    width: 1164px;
    display: flex;
    margin-top: 11px;
    padding: 0 20px;
    height: 60px;
    background-color: #fff;
    box-shadow: 0px 1px 2px 0px rgba(211, 211, 211, 0.5);
    line-height: 60px;
    margin-left: 100px;
    justify-content: center;
    align-items: center;

}

.recommend h3 {
    font-size: 18px;
    color: #00a4ff;
    font-weight: 400;
}

.recommend ul {
    flex: 1;
    display: flex;
    list-style: none;
}

.recommend ul li a {
    padding: 0 24px;
    border-right: 1px solid #e0e0e0;
    font-size: 18px;
    text-decoration: none;
    color: rgb(96, 85, 76);
}

.recommend ul li:last-child a {
    border-right: 0;

}

.recommend .modify {
    font-size: 16px;
    color: #00a4ff;
    text-decoration: none;
}

/* 推荐课程 */
.course {
    margin-top: 15px;
    margin-left: 100px;
}

/* 标题-公共类，与其他区域公用 */
.hd {
    display: flex;
    justify-content: space-between;
    height: 60px;
    line-height: 60px;
}

.hd h3 {
    font-style: 21px;
    font-weight: 400;
}

.hd .more {
    padding-right: 20px;
    background: url(../images/more.png) no-repeat right center;
    font-style: 14px;
    color: #999;
}

.bd ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    list-style: none;
    padding: 0;
}


.bd li {
    margin-bottom: 14px;
    width: 228px;
    height: 271px;
    background-color: pink;
    border-bottom: 10px solid #00a4ff;
}

.bd li a {
    text-decoration: none;
    color: rgb(96, 108, 116);
}

.bd li .pic img {
    width: 100%;
    height: 100%;
}

.bd li .pic {
    height: 156px;
}

.bd li .text {
    padding: 20px 20px 0 20px;
    height: 115px;
    background-color: #fff;
}

.bd li .text h4 {
    margin-bottom: 13px;
    height: 40px;
    font-size: 14px;
    line-height: 20px;
    font-weight: 400;
}

.bd li .text p {
    font-size: 14px;
    line-height: 20px;
    color: #999;
}

.bd li .text p span {
    color: rgb(248, 159, 99);
}

.bd li .text p i {
    font-style: normal;
}

/* 前端 */
.wrapper-web {
    margin-left: 100px;
}

.more {
    text-decoration: none;
}

.hd ul {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hd li {
    margin-right: 60px;
    font-size: 16px;
    list-style: none;
}

.hd h3 {
    text-align: center;
    margin: 0;
}

.hd li a {
    text-decoration: none;
    color: rgb(58, 55, 49);
}

.hd li .active {
    color: #00a4ff;
}

.bd {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bd .left {
    width: 228px;
    /* background-color: pink; */
}

.bd .top img {
    width: 957px;
}

.bd .left img {
    width: 230px;
    height: 415px;
}

.bd .right {
    width: 957px;
    /* background-color: pink; */
}

.bd .right .top {
    margin-bottom: 15px;
    height: 100px;
}

/* 版权 */
.footer {
    margin-top: 60px;
    padding-top: 60px;
    height: 273px;
    background-color: #fff;
}

.footer .wrapper {
    display: flex;
    justify-content: space-between;
}

.footer .left {
    width: 440px;
    /* background-color: pink; */
    margin-left: 100px;
}

.footer .left a>img {
    width: 200px;
    height: 80px;
}


.footer .left p {
    margin-top: 0;
    margin-bottom: 14px;
    font-size: 12px;
    line-height: 17px;
    color: #666;
}

.footer .left .download {
    display: block;
    width: 120px;
    height: 36px;
    border: 1px solid #00a4ff;
    text-align: center;
    line-height: 34px;
    font-size: 16px;
    color: #00a4ff;
    text-decoration: none;
}

.footer .right {
    display: flex;
}

.footer .right dl {
    margin-left: 130px;
}

.footer .right dt {
    margin-bottom: 12px;
    font-size: 16px;
    line-height: 23px;
}

.footer .right dd {
    margin: 0;
}

.footer .right dd a {
    text-decoration: none;
}

.footer .right a {
    font-size: 14px;
    color: #666;
    line-height: 24px;
}